<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>
        table, td, tr {
            border: 1px solid #666;
        }

        table {
            border-collapse: collapse;
            margin: 0 auto;
            width: 500px;
            height: 300px;
        }

        td, tr{
            vertical-align: middle;
            text-align: center;
        }

    </style>
</head>
<body>
<table>
    <tr>
        <td>内容1</td>
        <td>内容2</td>
        <td>内容3</td>
        <td>内容4</td>
    </tr>
    <tr>
        <td>内容1</td>
        <td>内容2</td>
        <td>内容3</td>
        <td>内容4</td>
    </tr>
    <tr>
        <td>内容1</td>
        <td>内容2</td>
        <td>内容3</td>
        <td>内容4</td>
    </tr>
</table>
</body>
</html>